gstreamer/tests/negotiation/capsnego1.c
Wim Taymans 2862ded8a2 Small example that shows caps nego recovery.
Original commit message from CVS:
Small example that shows caps nego recovery.
2003-04-17 22:32:59 +00:00

121 lines
3.5 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <gst/gst.h>
static void
caps_nego_failed (GstPad *pad, GstCaps *caps)
{
gboolean res;
GstPad *peer;
GstCaps *allowed;
GValue v_caps = { 0, };
GValue v_allowed = { 0, };
GstCaps *toset;
peer = gst_pad_get_peer (pad);
g_value_init (&v_caps, GST_TYPE_CAPS);
g_value_set_boxed (&v_caps, caps);
allowed = gst_pad_get_allowed_caps (pad);
g_value_init (&v_allowed, GST_TYPE_CAPS);
g_value_set_boxed (&v_allowed, allowed);
g_print ("caps nego failed on pad %s:%s\n"
" caps: %p (%s)\n"
" allowed: %p (%s)\n",
gst_element_get_name (gst_pad_get_parent (pad)),
gst_pad_get_name (pad),
caps,
g_strdup_value_contents (&v_caps),
allowed,
g_strdup_value_contents (&v_allowed));
if (GST_CAPS_IS_FIXED (caps))
/* if the elements suggested fixed caps, we just relink that way */
toset = caps;
else
/* else we use our hardcoded caps as an exazmple */
toset = GST_CAPS_NEW (
"testcaps",
"test/test",
"prop", GST_PROPS_INT (2)
);
res = gst_pad_relink_filtered (pad, peer, toset);
if (!res) {
g_warning ("could not relink identity and sink\n");
}
}
gint
main (gint argc, gchar *argv[])
{
GstElement *pipeline;
GstElement *src, *identity, *sink;
gboolean res;
gst_init (&argc, &argv);
pipeline = gst_pipeline_new ("pipeline");
src = gst_element_factory_make ("fakesrc", "src");
g_object_set (G_OBJECT (src), "num_buffers", 4, NULL);
identity = gst_element_factory_make ("identity", "identity");
g_object_set (G_OBJECT (identity), "delay_capsnego", TRUE, NULL);
sink = gst_element_factory_make ("fakesink", "sink");
gst_bin_add_many (GST_BIN (pipeline), src, identity, sink, NULL);
res = gst_element_link_pads_filtered (src, "src",
identity, "sink",
GST_CAPS_NEW (
"testcaps",
"test/test",
"prop", GST_PROPS_INT (1)
));
if (!res) {
g_print ("could not link src and identity\n");
return -1;
}
res = gst_element_link_pads_filtered (identity, "src",
sink, "sink",
GST_CAPS_NEW (
"testcaps",
"test/test",
"prop", GST_PROPS_INT_RANGE (2, 3)
));
if (!res) {
g_print ("could not link identity and sink\n");
return -1;
}
g_signal_connect (gst_element_get_pad (identity, "src"),
"caps_nego_failed", G_CALLBACK (caps_nego_failed), NULL);
g_signal_connect (pipeline, "deep_notify", G_CALLBACK (gst_element_default_deep_notify), NULL);
g_signal_connect (pipeline, "error", G_CALLBACK (gst_element_default_error), NULL);
gst_element_set_state (pipeline, GST_STATE_PLAYING);
while (gst_bin_iterate (GST_BIN (pipeline)));
gst_element_set_state (pipeline, GST_STATE_NULL);
return 0;
}